Two newly published patent applications reveal that Apple is exploring the use of curved and non-rectangular batteries hinting that we may see a new shape of device joining the iOS lineup in the future.

Two newly published patent applications reveal that Apple is exploring the use of curved and non-rectangular batteries hinting that we may see a new shape of device joining the iOS lineup in the future.

The patent applications, which have been filed with and published by the US Patent and Trademark Office, are titled "Curved battery cells for portable electronic devices" and "Non-rectangular batteries for portable electronic devices," which both cover methods to manufacture batteries that allow a more efficient use of space within a device's casing.

"Efficient use of space may be limited by the use and arrangement of cells in existing battery pack architectures," Apple explains in its patent description. "In particular, battery packs typically contain rectangular cells of the same capacity, size and dimensions."

"This common type of battery pack design may be unable to utilise the free space in the portable electronic device that is outside of a rectangular space reserved for the battery pack," the description continues. "For example, a rectangular battery pack of this type may be unable to efficiently utilise free space that is curved, rounded and/or irregularly shaped."

The manufacturing methods described in Apple's patent filings aim to solve this problem, by enabling the battery to take on a non-rectangular or curved shape.

"In some embodiments, the curve is formed to facilitate efficient use of space inside a portable electronic device," Apple describes. "For example, the curve may be formed at one or more ends of the battery cell to allow the battery cell to occupy a curved and/or rounded space within the enclosure of a laptop computer, tablet computer, mobile phone, personal digital assistant (PDA), digital camera, portable media player, and/or other type of battery-powered electronic device."

To achieve a 'non-rectangular' shape, Apple proposes removing material from the battery before stacking the cell layers to form a rounded corner, rather than the pressure and heat methods that could be used to create the aforementioned curved batteries.

Such batteries could be used to create an iPhone that looks similar to this concept image.